How to Highlight Actor/Widget in UE4 4.15?

There are several tutorial available explaining How to highlight Actor but looks like those are not applicable in UE 4.15.
Can anyone explain how to achieve highlighting in 4.15 ?

I so need the answer to this. Veterans, please help us out. T.T

What is it exactly that is not compatible?
What errors do you get?
Need more info to help.

What is it exactly that is not compatible?
What errors do you get?
Need more info to help.